Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer or spacer insulating structure
Reexamination Certificate
2006-04-04
2008-09-02
Ruthkosky, Mark (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer or spacer insulating structure
C429S094000, C429S144000
Reexamination Certificate
active
07419743
ABSTRACT:
A cylindrical lithium secondary battery that is resistant to breakage of the porous heat-resistant layer and therefore excellent in both safety and battery characteristics. The cylindrical lithium secondary battery includes: a battery can having a bottom, a side wall, and an open top; an electrode assembly; a non-aqueous electrolyte; and a sealing plate covering the open top of the battery can that accommodates the electrode assembly and the electrolyte. The electrode assembly includes a strip-like positive electrode and a strip-like negative electrode that are wound together with a porous heat-resistant layer and a separator interposed between the positive and negative electrodes. The thickness A of the porous heat-resistant layer and the thickness B of the side wall of the battery can satisfy the relation: 0.005≦A/B≦0.1.
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IPDL JPO Machine Translation for JP 07-220759 (publication date Aug. 1995).
Fujikawa Masato
Inoue Kaoru
Shimada Mikinari
Suzuki Kohei
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
O'Neill Karie
Ruthkosky Mark
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